<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片 -->
		<el-card>
			<!-- 头部警告区域 -->
			<el-alert
			    title="添加商品信息"
			    type="info" :closable="false" center show-icon>
			</el-alert>
			<!-- 步骤条 -->
			<el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
			  <el-step title="基本信息"></el-step>
			  <el-step title="商品参数"></el-step>
			  <el-step title="商品属性"></el-step>
			  <el-step title="商品图片"></el-step>
			  <el-step title="商品内容"></el-step>
			  <el-step title="完成"></el-step>
			</el-steps>
			<!-- tab栏 -->
			<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top" >
				<el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
					<el-tab-pane label="基本信息" name="0">
						<el-form-item label="商品名称" prop="goods_name">
							<el-input v-model="addForm.goods_name"></el-input>
						</el-form-item>
						<el-form-item label="商品价格" prop="goods_price">
							<el-input v-model="addForm.goods_price" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品重量" prop="goods_weight">
							<el-input v-model="addForm.goods_weight" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品数量" prop="goods_number">
							<el-input v-model="addForm.goods_number" type="number"></el-input>
						</el-form-item>
						<!-- 选择商品分类 -->
						<el-form-item label="商品分类" prop="goods_cat">
							<el-cascader
								v-model="addForm.goods_cat"
							    :options="cateList"
							    :props="cateProps"
							    @change="handleChange"
								clearable >				 
							</el-cascader>	
						</el-form-item>														
					</el-tab-pane>
					<el-tab-pane label="商品参数" name="1">
						<el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
							 <el-checkbox-group v-model="item.attr_vals">
							    <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>				    
							  </el-checkbox-group>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品属性" name="2">
						<el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
							 <el-input v-model="item.attr_vals"></el-input>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品图片" name="3">
						<el-upload
						  class="upload-demo"
						  :action="uPloadUrl"
						  :on-preview="handlePreview"
						  :on-remove="handleRemove"						  
						  list-type="picture"
						  :headers="headerObj" :on-success="handleSuccess">
						  <el-button size="small" type="primary">点击上传</el-button>
						  <div slot="tip" class="el-upload__tip">只能上传jpg/png文件</div>
						</el-upload>
					</el-tab-pane>
					<el-tab-pane label="商品内容" name="4">
						<!-- 富文本编辑器组件 -->
						<quill-editor v-model="addForm.goods_introduce">
						</quill-editor>
						<!-- 添加商品按钮 -->
						<el-button type="primary" class="btnadd" @click="add">添加商品</el-button>
					</el-tab-pane>
				</el-tabs>
			</el-form>
		</el-card>
		<!-- 图片预览 -->
		<el-dialog		  
		  :visible.sync="previewVisible"
		  width="50%"
		  >
		  <img :src="previewPath" alt="" class="previewImg">		  
		</el-dialog>
	</div>
</template>

<script>
	import _ from 'lodash'
	
	
	export default {
		data() {
			return {
				activeIndex: '0',
				addForm: {
					goods_name:'',
					goods_price:0,
					goods_number:0,
					goods_weight:0,
					goods_cat:[],
					pics:[],
					goods_introduce:'',
					attrs:[]
				},
				addFormRules: {
					goods_name:[{required:true,message:'请输入商品名称',trigger:'blur'}],
					goods_price:[{required:true,message:'请输入商品价格',trigger:'blur'}],
					goods_number:[{required:true,message:'请输入商品数量',trigger:'blur'}],
					goods_weight:[{required:true,message:'请输入商品重量',trigger:'blur'}],
					goods_cat:[{required:true,message:'请选择商品分类',trigger:'blur'}]
				},
				cateList:[],
				selectedCateKeys:[],
				cateProps: {
					value: 'cat_id',
					label:'cat_name',
					children:'children',
					expandTrigger:'hover'								
				},
				manyTableData:[],
				onlyTableData:[],
				uPloadUrl:'http://127.0.0.1:8888/api/private/v1/upload',
				headerObj: {
					Authorization : window.sessionStorage.getItem('token')
				},
				previewPath:'',
				previewVisible: false
				
			}
		},
		created(){
			this.getCateList()
		},
		methods:{
			async getCateList() {
				const {data: res} = await this.$http.get('categories')
				if(res.meta.status!=200) return
				this.cateList = res.data
			},
			handleChange(){
				if(this.addForm.goods_cat.length !=3){
					this.addForm.goods_cat = []
					return
				}
			},
			beforeTabLeave(activeName,oldActiveName){
				if(oldActiveName == '0' && this.addForm.goods_cat.length !=3){
					this.$message.error('请选择分类')
					return false
				}
			},
			async tabClicked() {
				if(this.activeIndex == '1'){
					const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{
						sel:'many'
					}})
					if(res.meta.status!=200) return

					res.data.forEach(item =>{
						item.attr_vals = item.attr_vals.length == 0 ? [] :item.attr_vals.split(' ')
					})
					this.manyTableData = res.data
				} else if(this.activeIndex == '2'){
					const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{
						sel:'only'
					}})
					if(res.meta.status!=200) return					
					// res.data.forEach(item =>{
					// 	item.attr_vals = item.attr_vals.length == 0 ? [] :item.attr_vals.split(' ')
					// })
					this.onlyTableData = res.data
				}
			},
			// 处理图片预览
			handlePreview(file) {				
				this.previewPath = file.response.data.url
				this.previewVisible = true
			},
			// 图片移除操作
			handleRemove(file) {
				const filePath = file.response.data.tmp_path
				const i = this.addForm.pics.findIndex(x =>{
					x.pic === filePath
				})
				this.addForm.pics.splice(i,1)
				console.log(this.addForm.pics)
			},
			// 监听图片上传成功的事件
			handleSuccess(response, file, fileList) {
				
				const picinfo = {pic:response.data.tmp_path}
				this.addForm.pics.push(picinfo)
			},
			add() {
				this.$refs.addFormRef.validate(async valid =>{
					if(!valid){
						return this.$message.error('请填写必要栏目')
					}
					const form = _.cloneDeep(this.addForm)
					form.goods_cat = form.goods_cat.join(',')
					this.manyTableData.forEach(item =>{
						const newInfo = {attr_id:item.attr_id,attr_vals:item.attr_vals.join(' ')}
						this.addForm.attrs.push(newInfo)
					})
					
					this.onlyTableData.forEach(item =>{
						const newInfo = {attr_id:item.attr_id,attr_vals:item.attr_vals}
						this.addForm.attrs.push(newInfo)
					})
					form.attrs = this.addForm.attrs					
					const {data: res} = await this.$http.post('goods',form)					
					if(res.meta.status!=201) return this.$message.error('添加商品失败')
					this.$message.success('添加商品成功')
					this.$router.push('/goods')
				})
			}
		},
		computed:{
			cateId() {
				if(this.addForm.goods_cat.length == 3){
					return this.addForm.goods_cat[2]
				}
				return null
			}
		}
	}
</script>

<style lang="less" scoped>
	.el-checkbox{
		margin: 0 10px 0 0 !important;
	}
	.previewImg{
		width: 100%;
	}
	.btnadd{
		margin-top: 15px;
	}
</style>
